Portfolio Required Return

Suppose you manage a $$5$ million fund that consists of four stocks with the following investments:

$\backslash$table$[[$Stock$,$Investment,Beta$],[$A$,$$$500,000,1\mathrm{.}50],[$B$,1,000,000,-0\mathrm{.}50],[$C$,1,250,000,1\mathrm{.}25],[$D$,2,250,000,0\mathrm{.}75]]$

$\%$